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A Fully-Integrated, Short-Range, Low Data Rate FM-UWB Transmitter in 90 nm CMOS

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2 Author(s)
Saputra, N. ; Electron. Res. Lab., Delft Univ. of Technol., Delft, Netherlands ; Long, J.R.

This paper presents a fully-integrated 3-5 GHz-band FM-UWB transmitter implemented in 90 nm bulk CMOS. The front-end consists of an RF current-controlled oscillator (RF-ICO) and class-AB power amplifier. Transmit data modulates a sub-carrier oscillator. The 2-FSK modulated output is amplified by a transconductor, and directly modulates the RF-ICO tune input. A successive approximation register (SAR) algorithm and on-chip all-digital frequency-locked loop (FLL) calibrate the carrier and sub-carrier frequencies. All voltage and current references required by the transmitter are included on-chip. The 0.2 × 0.5 mm2 active area transmitter consumes 900 μW from a 1 V supply. Energy efficiency of the transmitter is 9 nJ/bit running continuously at 100 kbits/s.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:46 ,  Issue: 7 )
RFIC Virtual Journal, IEEE
RFID Virtual Journal, IEEE